1066730645 has 4 divisors (see below), whose sum is σ = 1280076780. Its totient is φ = 853384512.

The previous prime is 1066730633. The next prime is 1066730653. The reversal of 1066730645 is 5460376601.

It is a happy number.

1066730645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5460376601 = 307 ⋅17786243.

It can be written as a sum of positive squares in 2 ways, for example, as 561784804 + 504945841 = 23702^2 + 22471^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066730645 - 2⁸ = 1066730389 is a prime.

It is a super-2 number, since 2×1066730645² = 2275828537964232050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1066730599 and 1066730608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106673060 + ... + 106673069.

It is an arithmetic number, because the mean of its divisors is an integer number (320019195).

Almost surely, 2^1066730645 is an apocalyptic number.

It is an amenable number.

1066730645 is a deficient number, since it is larger than the sum of its proper divisors (213346135).

1066730645 is an equidigital number, since it uses as much as digits as its factorization.

1066730645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213346134.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 1066730645 is about 32660.8426866179. The cubic root of 1066730645 is about 1021.7663374498.

The spelling of 1066730645 in words is "one billion, sixty-six million, seven hundred thirty thousand, six hundred forty-five".